using NodePointer = typename TSegmenter::NodePointerType;
using EdgeType = typename TSegmenter::EdgeType;
// long long unsigned int sizePerNode = sizeof(NodePointer) + sizeof(NodeType) + 1 + 4 *(sizeof(EdgeType) + sizeof(float)); // last term is specific to BS.
// long long unsigned int sizePerNode = sizeof(NodePointer) + sizeof(NodeType) + 1 + 4 *(sizeof(EdgeType) + sizeof(float)); // last term is specific to BS.
long long unsigned int sizePerNode = sizeof(NodePointer);